The type of sankey graphic is designed to represent the transfer between nodes.

1 Example

This example shows the number of songs in each group that appear in the playlists and their genre.

Parameterization of the box:

  1. Graph type selector Sankey.
  2. SQL statement to execute, in this case:
Copy 
<union type="all">
    <select>
        <columns>
           Artist.name <alias name='source'/>, 
           genre.name <alias name='target'/>, 
           count(*) <alias name='value'/>
        </columns>    
        <from table='track'>
           <join table='Album'>
               <on>track.albumid = Album.albumid</on>
               <join table='Artist'>
                   <on>Album.artistid = Artist.artistid</on>
               </join>	
           </join>                    
           <join table='genre'>
               <on>genre.genreid = track.genreid</on>
           </join>
           <join table='playlisttrack'>
               <on>playlisttrack.trackid = track.trackid</on>
               <join table='playlist'>
                   <on>playlist.playlistid = playlisttrack.playlistid</on>
               </join>
           </join>
       </from>
       <where>
            Artist.artistid &lt;= 20
       </where>
       <group>1,2</group>     
    </select>
    <select>
        <columns>
           genre.name <alias name='source'/>, 
           playlist.name <alias name='target'/>, 
           count(*) <alias name='value'/>
        </columns>    
        <from table='track'>
           <join table='Album'>
               <on>track.albumid = Album.albumid</on>
               <join table='Artist'>
                   <on>Album.artistid = Artist.artistid</on>
               </join>	
           </join>                    
           <join table='genre'>
               <on>genre.genreid = track.genreid</on>
           </join>
           <join table='playlisttrack'>
               <on>playlisttrack.trackid = track.trackid</on>
               <join table='playlist'>
                   <on>playlist.playlistid = playlisttrack.playlistid</on>
               </join>
           </join>
       </from>
       <where>
            Artist.artistid &lt;= 20
       </where>
       <group>1,2</group>        
    </select>
</union>

* Starting from the table of tracks and grouping according to gender, artist and tracklist, we see how these 3 fields are related according to the number of songs that meet the conditions. Only 20 artists have been taken into account

INPUTS:

  • source: Name of the issuer.
  • target: Receiver name.
  • value: Amount of value that is transmitted between source and target .

Each entry contains the information corresponding to the relationship between two unique elements of the graph.

2 Interaction

In this type of graph the user can interact to sort the different boxes on the screen, and to over mark any specific relationship between nodes.

  • (1) Sort the nodes: By clicking on any node, you can drag on the screen

  • (2) When you move the cursor over the arrows they will be set to a darker tone to over mark the target and the source of the arrow.